长绵粉蚧的发生规律和防治技术研究

Acta Agriculturae Boreali-occidentalis Sinica(2005)

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Abstract
长绵粉蚧在陕西省苹果园1 a发生1代,以3龄若虫在树干、大枝粗皮缝隙处结茧越冬。4-5月为主要为害期,出蛰若虫和成虫吸食苹果树枝、叶、果实的汁液,削弱树势。防治上应重点抓好果树开花前越冬若虫出蛰期和6-7月1龄若虫发生期的化学防治;开花期-幼果期应以保护利用天敌为主,尽量避免喷洒化学农药。
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Key words
Occurrence regularity,Phenacoccus pergandei,Control technique
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